I know more than a handful personally who are. Why do they go to Ames? To hang out and go to a football game with their friends who happen to be (gasp) Cyclone fans.I doubt if there is anymore than a handful of Iowa fans buying season tickets to ISU then selling the rest of them. Why go through all that hassle, when they could pick any game at Iowa to get tickets too or just buy them on the secondary market.
Iowa is not like Nebraska years ago where every game was sold out and the only way to see them play was to go on the road. Hell, I really doubt many Nebraska fans were doing it either.
If your assertion is true, why does it just happen the uptick in season tickets always seem to happen when the Iowa game is a home game? Hint: It's because Iowa fans are buying season tickets for $175 instead of paying $100+ on the secondary market and selling the early season games to pay for them.